Control means fob tractor



Nov. 12, 1946.

R. D. ACTON CONTROL MEANS FOR TRACTOR-CONNECTED IMPLEMENTS Filed March 22, 1944 6 Sheets-Sheet 1 Irwenzzaz" 'Russel D ficion Nov. 12, 1946. R. D. Ac'roN 2,410,918

i CONTROL MEANS FOR TRACTOR-CONNECTED IMPLEMENTS Filed March 22, 1944 6 Sheets-Sheet 2 YZzLsseL' D. flcZ'oTC By MQ'PW R. D. ACTON Nov, 12, 1946.

CONTROL MEANs FOR vTRAGTOR-coNNEcTED IMPLEMENTS Filed March 22, 1944 6 Sheets-Sheet 3 R. D; AcToN Nov. 12, 1946.

CONTROL MEANS FOR TRACTOR-CONNECTED IMPLEMENTS Filed March 22, 1944 6 Shee'bS-Shee'l'l 4 R. D. ACTON Nov. 12, 1946.

CONTROL MEANS FOR TRACTOR-CONNECTED IMPLEMENTS Filed March 22, 1944 GSheets-Sheet 5 R. D. ACTON Nov. 12, 1946.

CONTROL MEANS FOR TRACTOR-CONNECTED IMPLEMENTS Filed Ma rch 22, 1944 6 Sheeis-Sheet 6 JOE* 0 g. J gm a I w 9, j W W f m" 9% owm o /H L 7 a w j 1 9 F51 k 1 4 (m N 8 .O 0 WW 9 w, 9'

Patent ed Nov. 12, 1946 CONTROL MEANS FR TRACTOR- CONNECTED IMPLEMENTS Russel D. cton, Chicago, Ill., as signor to International Harvester Company; 'a corporation of New Jersey Application March 22, 1944, Serial No. V528,672

34 Claims.

rfhis application is a continuation in part of my c'o'pending applicationSerial No. 407,552, filed August 20, 1941.

The present invention relates to a control means for a' tractor-connected implement. More specifically, it relates to'fluid-pressure means for controlling'or 'adjusting a't'ractor-mounted or a trail-behind implement. 7

LLIt is known to provide a tractor-connected implement with aV fluid-power device lfor adjusting andkco'ntrolling the implement, the device being actuated by the powerI Vof, the' tractor. With such an arrangement4 there is normally a hose for fiuid running from'the tractor to the implement. The disadvantag'e isvthat when the implement is dis'connected'from the' tractor the fluid-power means m'ust also be disconnected from the implement orfron'i'the Atractor or from both, and this n'rr'nally requires a' disconnectionlof a linev or conduit'throu'gh which fiuid is passed. With the break 'of 4a'fl'uid'line there is considerable danger of loss of thelifluid.'1,In the'present invention the fluid power means is'removed without breaking of the fiuid-carryin'g line.

' An'ro'bject of 'the .present invention is to pro- Vviclejan 'improved control means for a tractorvc'onnected implement;

1Another object is the provision of a unit type hydrauli'c power-transmittin'g device particularly adapted for 'adj'usting a tractor-connected implement from a power lift mechanism.

further 'object'is the provision of an improved' pressure-f luid means for adjusting a trailbehindtractor-connected implement from the tractor.

' Another object is to provide a plurality of remote' controls for rvt'ra'ctor-connecte'd implements where'by" structure or elements functioning independently of 'each other may be separately ad- 'jusltedr. l I x v i 'e *According to the present invention, a special detachablelunit comprising a first cylinder'with a pistonithereinja'second cylinder with'a piston 'therein andy a connectirig conduit is mounted so that'fone'cylinderis 'upon a tractor and the other cylinder is upon or'connected to an implement carried by Vor yconnected 'toi'the tractor. The pisto'r'ifin the cylinder Von the tractor isj shifted iilnflthe cylinder by'po'wer derived from the 'tractor power plant acting through'external mechanical means jonfthe tractor. When the implement is tofbe'jydisonnected from the tractor,'the one cylinder fis' disconnected fromv the' implement, a the disconn'ection of th'e cylinder and' 'the piston jonthe tractor frorn'the source'of tractor power is made at the external mechanical means through which power is supplied to the cylinder of the piston. Thus, there is no disconnection througha Vfluid line, and the disadvantages of such'a disconnection are avoided. Moreover a hydraulicor mechanical power-lift mechanism as supplied oh many tractors'can be utilized to adjust fiexibly connected implements with case and accuracy.

In the drawings:

Figure l shows a side view of a tractor with parts removed, and a plow connected at the rear of the tractor; I

Figure 2 is a detail view showing the special unit of the present invention by which thev plow is 'adjusted from the tractor;

Figure' 3 isa 'sectional view taken through a part'of the tractork of 'Figure 1;

Figure 4 is' a'side view generally similar to Figure 1 butwithfthe implement omitted and a modified 2means' for "actuating the special unit sh'ownk in Figure 2; i w"Figure 5 is a', detail form of unit;

' Figure'j'is a side view of a .tractor with a harvesting machine attached thereto incorporating a modifrcationof the invention in which two push tool'l hydraulic devices 'are utilized; i'

Figure? is a'si'de view of a tractor with a plow attached thereto having a gauge wheel, whereby two independent power-lift mechanismsimay be used for regulatin' g'and lifting the plowj- Figure 8 is a plan'view of the tractor shown in Figure 7 with two vseparate power-lift cylinders indicated in dotted lines; I 'e Figure 9 ah-enlarged plan view of the central view showing a' modified body portion vof tractorfshown in Figure 8;

'Figure 1G isajvertical'sectioiiof the central portion -Vof the tractor'bodyof- Figure-9 showing the hydraulic lift"construction-iL 4 V V Figure 11 is ai-de elevation ofthe cylinder con- 'Figure 10; and 4" struction show I I :plan view of the cylinder con- Figure 12 is stru'ction shown in Figure 112 v L'In the drawings, reference character Ifl designates a conventional type' of tractor having a body I rear axle l2,*and rear wheels [3V of which only oneisjshown'" rl'he tractor carries a power take-off'shaft 14, Vfluid-pump' [5 actuated=by the power take-oif'shaft IQ, and-a l:cylinder 16. This arrangement ofparts is-niore completely shown in the patent "to' Brown'1',92 9,80f1, 'Octoberr lO, 1933; Briefly stated; *a 'pistond'L as 'shown in Figure 3,-:issslidablymounted'in thecylinder I'G. r:he-piston isfrnovable within thecylinder in fiidei response to fluid under pressure supplied to the cylinder by the pump [5 through ports |8 and IS controlled by a valve 20. The valve is under control of a hand lever 2| pivoted at 22 on the tractor and connected With the valve by a rod 23 extending from the valve. There are stop shoulders 24l andy 25 jon the rod 23. The lever 2| is held in a central neutral position, as shown in Figure l, by'the action of springs 26 and 21 mounted upon a member 28 extending through the lever 2I. When the lever 2| is in the central neutral position of Figure l, the valve 20 is inV a corresponding neutral position in which the ports |8 and |9 are closed, and fluid within the 'cylinder l6 on both sides of the piston 11 is looked in the cylinder. Figure 3 shows the piston |1 to be at the right end of the cylinder 164.V When-the piston is to be moved to the other end, the hand lever 2l is actuated to move the valve 20, leaving' the ports H3V and I9uncov'ered so that fluid under presife'maygbe admitted'to the port |8 and' allow'ed to 'escape through the port l9. I'jjExtending from the piston" is a rod 29 hav- .ing'ari'ienlarged portion 30 vat its end from which extends tiransversely a member 3| having an opening'throughwhich the rod 23 extends. The s'tops'houlders 24' and 25 areabutted by the member' 3| as the piston l1'mo'ves in one direction or another, and when the piston has'reached the end of. -thecylinden the .member .3l will have abuttd. one' stopi'shoulder'and will thereby force thevalve 20'into a neutralipositi'on in which both portsrl and 19 are closed. When'the piston |1 isbeing'l'moved inone direction or another, the

hand'lever 2| 'must,be.,h e1d away,from theneutral position so thatjtheva'jlve'20 opens the ports. 'When the hand4 lever'Zldsfreleased; the springs 26 and -21 immediately return' 'the lever to a neutralposition and also return the valve '20 'to a 4r'ieitrfal 'po's'it'ibn'. Thus, movement of the piston |1 is st'pped; With the vaivezu in neutral position-the ports IB and. l-9 arefclosed 'so that fiuid ilne'ith'er admitted to the cylinderrnor allowed to..=escape therefrom, and the piston 'is'held I "d'hllnltliisfiway 'the piston! may be moved fromineff'endo'f the'cylinder to the other and may be'lloc'k'edi'n lany desired vposition either at the. ends'of'th'e4 cylinderv orat any point intermeep'jeo themes;

I'rne.tractor |*o earriesa drew-tarl 32 1.6 which ia' p1ow.33,f1s',fleating1y connected. The plow sa comprises' beams- 34, plow bottoms 35, wheels 36, 31,f.;nd 38 connected to the beam by cranks 39, 40,' and 4I. VThecrankslare interconnectedby fmeans of links 4:2; and 43and .a lever 44.V Figure V -lV snowsthe .plow:bottomsl in working position.

:Whenfthe plow isto be transported, the cranks .39,4 and 4l byv which the wheels are connected are swung with :gespectto the'plowbeams 34 so that thebeams-.are raised. Raising of the plow' to transport position is .vaccomplished by a special flexible unit now to be described;

As seenin Figures 1. and; 2, this unit comprises a structure :having a cylinderl45'with a plunger -intheV form, of aa piston 46 slidable therein, a

structure having., cylin'der* 41 .witha plungerin ft'he'forin,offa..pis't on sldable thereir, a spring :495. urging'the'piston into the position shown in 4Figurefz, and aconduit 50 which serves to confine a-:pressure'or power-transmitting medium conn'efiegf the' iiwbf ylieders- '-1 :The eylmder 4.1 is 'connected to' the plow33, as indicated 'at 5l.V A

rod s'ziieeniieete'q with the pistqn as'exte'ndsfr'om 'tne"yiader. 41affairs eonneeteiatss with abeu fcrank 54 'pivoted at 55 n a bracket 56 secured* Fluid, as indicated at 66, is contained in the cylinder 4.5, the conduit 50, and the cylinder 41. By vvirtiio'f the connection between the piston |1 in the cylinder [6 and the piston 46 in the cylinder' '45 movement of the piston l1 in the cylinde'r l 6 under 'thev action of fluid under pressure supplied toV the cylinder |6 by the pump |5 is transmittedto the piston 46. Thus, as the piston l1 is moved from the extreme right position of Figure 3, it serves to move the piston 46 from the extreme left position of Figure 2.V As the piston 46.moves from this position, the fiuid 66 isfforced from' the' cylinder 45 through thejhose 50 into the cylinder 41, and the piston 48 'is'mOved to the rightragainst the actionl of the spring-49, Thus, thecrank axles 39, 40, and 4| are caused to'rotateso that the plow 33 is raised. When the plow isto be lowered, the piston l1 is 'moved to the right and the piston '46" to the -left;,' j'I'hus',

' the; piston v48 mayalso f'mlovefito the lleft under thej bffion' of the vspring 49"'and the fw'eight' of thejplowbottoms 35, and-the plow/bottoms-35 are permitted to engage theground again. Aisfprevieusiy-'stated-the piston |'1 maybe'hem in any position intermediate the ends of the cylinder l6. Conseduently, the Vpistons 46 and 48 'will be held intfianfintermediate position, and' the* plow boti toni's4 l354 may'assume' a' position intermediate the lowestj working position' and the highest transi por'tposition; vIn'"ths way the' Operating4 depth of *t'hef IplowV bottoms35 may becontrolled.

Thecylinders'45 yand 41 withtheir'pistons and :rods .andthe 'conduit 50 may be considered as' a 4special unit' which' is disc'onnectableffrom' the Vtractor l0 and the plow 33,'ia'sv s'howrijiri Figure' 2. Obviously,' all thatis 'required for this disconnection is the 'disconnection' of thei cylinder V41 fromjthe point 5l on the plowfthe'disconnection :offthe'rod '52 from thebell *crank' 54,' the disconnection* of ythe 'cylinder 45 from the'point 58 on vthe tractor; and the dsconnection of the rod 6| from the lever '63: Thu's, removal of the unit is"'possible,without a Lbreaking of the fluid line, and'tllisi is possible because external mechanical means" connects the cylinder 45 and piston 46 and thetractor power plant which may'be're'- garded-as the power ltake-off shaft l4, the'pump l'5,'and the cylinder l6; This external'mechani- Ical means may be considered tobe the link and'rleveri63'connecting the'rod 29 and rod 6] attached to the piston l1 and piston 46, respec- Figur'e .4 shows' the' cylinder 45 and" the 'piston L4'6connected toaidiffer'ent form of'tractor-actuated' power means., 'Asshown inthis figure, the .a'ctu'ated 'power means is a crlnk E1fwhl'ch'is ro- "t'ate'd' between 'extreme positions'v ok apart' by iechanical br by fluid 'power means, as shown vin jthe'patent' to" Johnston", 2,039,'891,'May 5, V1936.

Witl this type "of 'actuatin'gi means the crank 61 .of the cylinder 45. is required-I As'seeri in Figure 4', the cylinder* 45' is connected at 68 to one arm of a bell crank 69 pivoted at on a tractor drawbar 11. The other-arm of the bell crank 69 is connected to a nut 12 threaded upon a crank 13 adjustably Secured to .the draw-bar 11 by nuts 14. By means of the crank 13 there maybe a lowerin'g or raising of the one arm of the bell crank' 69,

and a horizontal shifting -of the other arm of the bell crank 69 to which the cylinder 45 is attached;

of the device of Figure 2 which insures the movement of the. piston 48 to .the left end of the cylinder 41 is unnecessary, for the shifting of the piston 40 in either direction causes a corresponding shifting in either direction of the piston 48, since there Vis pushing by fluid in both directions.

In the modifications shown in Figures 6 and 7, a tractor is utilized having a double power lifting arrangement as shown in Figures 8, 9, 10, 117 and 12. In said figures, the rock-shafts .and-the independent cylinders are clearly shown as well as certain-significant parts of the operating means which-provide for independent manual operation of either of the lifting arms. The details of the valves are not shown in detail, as this invention is .concerned with the transmission of power from the; independent lifting arms to implements connected -to the tractor. The power lift construction and -all the Operating elements thereof are disclosedv in application, Serial No. 466,463, filed November 21, v1942.

The tractor shown in Figures 6 to 10, inclusive, includes a narrow central body portion 15 and a rear body portion 16 from which extendedrear axle Structures 11 extend. Tractionwheels 18 are mounted on .axles carried by the axle structures i 11. Certain other parts of the tractor are shown including an operator's station 19, a g-asoline tank 80, a -steeringcolumn support 81; a steering column 02, and a steering wheel 83. .As indicated by dotted lines in Figures 7, 8, and 9, the central body portion 15 contains a pair of power lifting cylinders 84. Each of said cylinders is pivotally connected to a bracket 85rigid with respect to the body portion 15. Each of the cylinders, as shown in Figures 9 and 10, is also provided with a conventional piston 86 connected by a piston rod 81 with a .crank arm 88 carried by a sleeve 89. The sleeve 89 is Secured to a shaft 90 rotatably mounted in a journal portion 91 formed in the casting of the body portion 15. VA power lift arm 92 is connected to each of the shafts 90. It will be understood .that the lifting arm 92 may be connected at any angular position on the shaft 90 either extending upwardly or downwardly, both positions being illustrated in Figure 7 by the lifting arms at opposite sides of the tractor.

Figures 10, :11, and 12 show some of .the details ofa Ifollow-through type of lifting mechanism disclosed and claimed in the application previously referred to. Such a mechanism is'particularly adapted for use with the push-pull hydraulic mechanism for implements-which forms the subject-matter of the invention of this application. Referring to Figure 10, a source of fluid pressure such -as a pump mounted on the tractor and driven by the power plant there'of Supplies fluid under high .pressure .through a conduit 93 to a conduit 94'which leads to a distributing chamber 95. From said chamber the fluid under high pressure is delivered from a conduit 96 toa valve mechanism for controlling the delivery of fluid to and from either end of'the cylinder. Fluid released from the cylinderat' low pressure is delivered through a conduit 91 touthe distributing' chamber and therefrom through a conduit, not shown, to a low pressure conduit 98 which leads back to the source of fluid under pressure. A valve control member 99 pivoted on a longtudinal axis at the top of'the cylinder has an Operating extension 100 which is positioned to operate either of .two valve actuating elements 101, Each of said elements is operable to supply fluid under pressure to one end of the cylinder and to simultaneously release fluid from the other end of the cylinder. The control memberf99 'is also provided with a pair of extensions 102 which carry a rod 103 on which a member 104 is mounted, said member dependingV downwardly as best shown in Figure 11. Said member 104 is provided with a pin 105 which slidably rides in a slot 106. Said slot is formed with two spaced parallel portions 101 and an angular portion 108 joining the parallel portions. Said slots are formed in a follow-member 109, which is connected to the pivot pin 110 which joins the conconnecting rod 81 and the arm 88. V

The member 104 is slidable on the rod 103/and is connected to anv actuating member 111 Which is pivotally connected to a lever 112 pivoted on the 'body portion 15 forwardly of the pivot axis of the shaft 90. An, actuating rod 1 13 is pivotally connected to the upper'end of the lever 1 12 and to 'the lower end of a manually rockable lever 1 14 pivoted on a bracket 115 carried by the steering column support 81. The lever 114 is shiftable over a quadrant 110. The position of the lever on the quadrant through the linkage above described determines the position of the member 104. When the lever 114 is moved, the member 104 depending upon its direction of movement rides up the angular slot 108 into the slot 109. to operate the cylinder to move the corresponding lifting arm 92 in one position. When the member 104 is moved in the other direction into the slot 106, the lifting arm 92 is moved in the other direction. Following movement of the member 104 out of its neutral position midway of the angular slot 103, the piston moves until the follow member 109 moves to the extent that the pin 195 is again located in the central portion of the slot 108. This construction enables the operator to pre-select any predetermined position of the arm 92 by moving the lever 1 14 to a corresponding position. As there are two complete lifting cylinders, each having its lifting arm 92 and manual control lever 1 14, it is to be understood that either may be independently op-erated at any time.

Referring to Figure 6, a bracket structure 111 at the rear of the body portion 16 of the tractor extends upwardly including two brackets 1 13 and 119. An hydraulic cylinder is pivotally connected to the bracket 118, a piston 121 in the cylinder having a piston rod 122 extending from the cylinder and pivotally connected to one of the lifting arms 92. A second cylinder 123 is pivotally connected to the upper bracket 119. A piston 124 in the cylinder 123 has a piston rod 125 extending forwardly to a point of pivotal connection to the second lifting arm 92 A fiexible conduit 126 connected to the cylinder 120 extends rearwardly to a point ofconnection with a cylinder 121. A flexible conduit =7 |28=extends rearwardly "to a point ofnc nnection wi1-,,11j,a,.cyundeiu2s1;,,,1;.g i v hfvesterl'thresh rfillu'strated in outlinjL has Been? shown jas beingA connected to; the tractor at thlr'ear: thereof. 1 Saidfharvester ;thresher, indicatd .inits =entir'ety :by the' reference character 311,v is lcarried011 supporting Wheels* .providedwith rubber tire'sf,A one .of which llgis shQWnfinQthe cirttwin'gs; JA frame'structnre;,a2 extenqingf'fprwar'dly from the4 harvesten' thresher, is 'connected by apin |33with .a draw-bar, 'structure [34 rigidly Secured l to the [rear axle extension 'I'l' ofthe! tractor.v The lfiarve'st'e'rV thresher is: conventional in the 'art an,dginClugiesu principally. a thrher part 135 ,,ar' 1 d aharvester hart; 1351 Dir/Polly'11101111ted at' L 131911' thev'thresher tartare r1, struet'ure inf 0111665; Ia frame: l 38,; ".Qne,'S1e'9f-,Wh9h .Show in thidraW-mes, is Pirtally reppected at; min the harvelsteifp'art' l36.L n refel |4 ljisrotatably carried by the. r.fr-finit 1,38; j .Said f tlris .mamma bil, .ashaftzlllyZ journaled in braclge'tsfll mbunted on theflforwardlyf'extending fiortions'of the frame C38: A bracket |43",'monntedoi a portion of the frai'ne'structurev Bli-(provides anf attaehnient pointv for apiston rod'flM connected to'a'ipiston [45 mounted'in the cylinder IZBI'ThecyIindf-:r

itself ispivotally connected at -M6 'to theh'ar-- vest'er* 'part I3'6 at a' point sfpaceq'fr'om' the'piv'otm connecting point Mn'of thfreel'frarne. AvIt'will be' understood; therefore,7fthatl the movement of thefpiston M5 relativel to the cylinder l29 vvertically adjusts the rel structure Withire'spect to the harvester part '135. -vSuch adjus'tment. is fnecessary *during tlef'operati'on 4 offl .a harvester thresher'due to'the adjustm'ent .of the harvester part which Wille be herelnafter'de'scribed and due to the heighti* and 'type of grain being harvested.

The cylinder |2'|V is pivotally connected at M1 with a bracket 'M8 depending downwardly from the draft frame 4structure ['32. A piston M9 in the cylinder 21 is provided with a piston rod |50 which is pivot'ally-connect'edxat l5l with the harvester part [35. ,fIt,,wil1'be understood that any movement ofj the piston 149 -relative to its cylinderv l2'I willfvertically adjustgthe harvesterpart which includee Vbeamsfi ss. g and 154,v is qpickiy connected toan attaching structure 31155 which' standingubracket71.62V on the rear plow beam [53 carries a piston [G4 which is secured to a piston rod alt/5.."v Said piston rodjis pivotally securedto the :lever-160,; rl'his lconstruction provides foradjusting the gaugewheel 151 relative to the frame structure' of the plow by any movement of Ithe piston 64 relative; to the cylinder lliJ, thereby regulating the Operating d epth of'the plow. 'A

' flexible conduit |66 connected to'the cylinder 'fl soI NB. 'This adjustment is necessary in the operation *of aharvester thresher and is frequently used duringv passage through the fielddue tolthe variation in the type of grain and the type of undergrowth in the grain.

i When anv operator is harvestinggrain Withthe tractor implementgcombination shown in Figure 6, he has at hiscomplete control the vertical adjustment of the reel and the harvester part with respect to the other and 4with respect to -the ground level; DueV to the use of flexible conduits |26 and l28, any mechanical connections are avoided, vand thepiv'o't .point of the draft 'frame 132 on the tractor relative to* controlling mechanism need Hbegiven no consideration. i M'oreoverv it is unnecessary to extendlong and complicated mechanical' controls from the .trailing implement to the tractor.V The operatorhas at his' command, by'merely moving the control lever H4, the exact position ofthe -reel 'With respect toV the'harvester part |36v and the position'fof the harvesterpart |36 with respect to the ground. Atractor having extendsvto theI tractor where it is l connected with a cylinder 161. S aidlcylinder, is, pivotally connected at 163 witha bracketca'rrie'dfhy the rear axle 'Il of the tractf'gr.4 A piston l69 mounted in the cylinder] 61 has a forwardlyeirtending'piston rodglfl Ofwhich is pivotally connected to tone of the lifting arms 92 Which in this construction 'extends downwardlyffrorn its shaft 90; When the arm 9-2i' rnoves inf'a clockwise direction, fluid infthe' cylinder *l 61 is compressed and forced underpres'- sureintofthe 'cylinderrlfil movingflthe l'istonW l64 forwardly and pushing downfithe kgau'gejwheel l 51 thereby raising the fplow -lolottolmsI 1551' 'When the'iiftingarm '92 is moved by'itsV hydraulic-ctating; mechanism in: an anti- 'clockwis'e direction, the weight of the plow move's'ftheypiston 164 rearwardly allowing the plow to operate' at 'greater-dept-h- ..-:.et :.i f

A'V bracketf structure, includingv members' I 'I-I and H2 connected to the attachings'tru'c'ture '155, extends rearwardly 'to-form a support for va transverser rock-"ishaft l 1'3).v Said rO'cl-'Shaft ycarl'es an'ipwardly eirtedingarm 'H4w which'is *conliitedl by a lik 'H5 With One Ofthe -lft'ihwg arms the shaft V[13 is provided with'fa'pm P I 11 -s'lidable in' a slot na formed mameifiberns; said member has afldwnwardly extending portion, 'Which isf'connected' 'Withj a bracket 'I8l SecuredV to the frame |52V of the pio'w. By movement* of the nfttolprevent -exeessive vdropping of theplowfdue to holes or d ueto extremely soft' conditions'when the-gauge Wheel IS'I is not effective in supporting the plow. f j ,V I In the modification' of Figure,l itwill'be noted that the operato'r; by means of; the "two control members [lt-'which are within easy access lof his reach, can adjust the plow at anytimeduring operation and can with equal ease lift the plow completely from the ground without 'disturbing thev depth adjustment. This is particularly"significant in plowing operations vasv the plow must be removed from the ground before turning and as'it is important to again operate atthelsame epthlwithmit readiustment;

It will be apparent from the foregoing description that novel means have been devised for controlling either an implement directly connected to a tractor or one pulled therebehind in trailing relation. This means utilizes in combination a hydraulic fiuid system complete in itself with a mechanical member forming part of a tractor power lift mechanism. It enables an cperator to use a tractor having any type of power lift mechanism in conjunction with an implement which must be controlled during operation of the tractor. The degree of control obtainable depends upon the characteristics of the tractor power lift mechanism, several types of which are disclosed in this application. Figure 4, for example, shows the simplest type of power lift mechanism now in extensive use. In this mechanism only two positions are obtainable by a half revolution mechanical or hydraulic type of power lift. For that reason a manual adjustment was provided in said construction. Figures 1, 2, and 3 illustratea construction in which a two-way hydraulic power lift mechanism is provided on the tractor with two-way power being supplied to an implement by means of positive fiuid pressure in one direction and spring pressure in the other direction. Figure 5 illustrates another type of pressure applying means for use with the twoway power lift mechanism of Figure 3 in which powerV may be applied positively in both directions. In the power lift construction of Figures 6 to 12, inclusive, two power lift mechanisms are provided of the follow-through type in which the cperator may manually select the position of the power lift arms with the power lift mechanism following and throwing out automatically when the selective point is reached. This two-unity g actuating system may be provided as an attachment which is complete within itself and which does not require connection into the hydraulic system of a hydraulic lift mechanism. Breaking of the fiuid conduit or leakage does not affect the tractor power lift mechanism. Moreover these units may be used at different times, on different tractors, and on different implements by merely providing the necessary attaching brackets.

It is the intention to limit the invention only within the scope of the appended claims.

What is claimed is:

1. In combination with a tractor having a power-actuated member thereon, an implement connected to the tractor for free floating movement relative thereto, said implement having a functional implement part and a member movable to adjust said implement part, means for looking said power-operated member in any one of a plurality of positions, and a unitary selfcontained hydraulic unit including a cylinder mounted on the tractor and a piston in the cylinder secured to the power-actuated member, a cylinder secured to the implement having a piston therein Secured to the implement-adjusting member, and flexible fiuid conduit means connecting, said cylinders whereby the functional implement part may be accurately adjusted and maintained in adjusted position by the power-actuated member on the tractor during movement of the trac- 10 tor and movement of the implement relative to the tractor..

2. A hydraulic adjusting device for tractor-attached implements comprising, in combination with a tractor and an implement connected thereto, a power-actuated adjusting member on the tractor, 9, manually operable means for controlling the application of power from the power plant of the tractor to said member, said means being operable to automatically disengage the power means when said member reaches either of two extreme positions and to be manually operable to disengage the power means at a plurality of intermediate positions, a cylinder connected to the tractor, a piston mounted in said cylinder and secured to said adjusting member, said member being operable to reciprocate the piston within the cylinder, an adjusting member connected to an implement part to be adjusted, said member being operatively connected to a piston, a cylinder in which said piston is mounted for reciprocation, said cylinder being connected to the implement, conduit means extending from the first-mentioned cylinder to the second-mentioned cylinder, said conduit being effective to deliver fiuid under pressure developed during the compression stroke of the power-operated piston on the tractor to apply pressure to one side of the piston in the secondmentioned cylinder, and spring means mounted in the second-mentioned cylinder to apply pressure against the piston in a direction opposite to the force applied by the fiuid pressure, one of said cylinders being full of fiuid when the other is empty, whereby by means of the spring pressure the two cylinder and piston arrangements and the conduit connecting the two form a push-pull device whereby the adjusting member for the implement follows the movement of the power-actuated member on the tractor.

3. In combination, a tractor having a power plant, an implement floatingly connected to the tractor, said implement having a functional implement part adjustably mounted thereon, a unit having one end mounted upon the tractor and the other end mounted upon the implement and readily detachable therefrom for adjusting the implement by force applied at the tractor, said unit having conduit means extending from the tractor to the implement, a first movable part at the end of the conduit means on the tractor, a second movable part at the end of the conduit means on the implement, and a fluid contained in the conduit means such as to cause movement of the first movable part to effect movement of the second movable part, means connecting the second movable part and the implement, external shiftable mechanical means on the tractor for moving the first part and therewith the second movable part for adjustment of the implement, and means connecting the external means and the tractor power plant and including a cylinder, a. piston slidably mounted within the cylinder, means connecting the piston and the external mechanical means, and means for supplying fiuid to the cylinder to shift the piston and for looking the fluid within the cylinder to prevent movement of the piston in any one of a plurality of positions.

4. In combination, a tractor having a power plant, an implement floatingly connected to the tractor, said implement having a functional implement part adjustably mounted thereon, a unit having one end mounted upon the tractor and the other end mounted upon the implement and readily detachable therefrom for adjusting the implement by force applied at the tractor, said unit having conduit means extending from the tractor to the implement and a fluid contained in the conduit means such as to cause a force applied to the end of the unit on the tractor to ybe transmitted by the'iiuid to the end of the unit on the implement, means connecting the end of the unit on the implement to the implement, external meohanioal means on the tractor for applying force to the 'end of the unit on the tractor and therewith force to the end of the unit on the implement ffor adjusting the'implement, and means oonnecting the tractor power plant and the external mechanical means and including a cylinder, a piston. slidably mounted Within the cylinder, means connecting the piston and the external mechanical means, and means for supplying fluid to the cylinder to shift the piston and for looking the fluid within the cylinder to Prevent movement of the piston in any oneof a plurality of positions.

w5.''In combination, a tractor having a power plant, an implement floatingly connected to the tractor, saidv implement having a functional implement part adjustably mounted thereon, a readilydetachable unit for adjusting'the implement by force applied at the tractor, said unit comprising a first device mounted upon the tractor and i composed of a cylinder and a piston slidable therein; a second device mounted upon the implement and composed of a cylinder anda piston slidable therein, a conduit connecting the devices, and fluid oontained in the conduit. and the cylinders, means connectingthe piston of the second device and theV implement, external mechanical means connected with the piston of the first device for. shifting the same and therewith the piston of thejsecond device for adjustin-g the implement, and means conneoting the external meohanical means and the tractor power plant and including a cylinder, a piston slidably mounted within the cylinder, means connecting thelpiston and the externaI mechanical means, and means forfsupplying fluidto the cylinder to shift the piston and for looking the fluid within the cylinderto prevent movement of thepiston in any one of a plurality of positions.

i6. In combination, a tractor having a power plant,, an implement floatingly connected to the tractor, said implement having a functional implement part adjustably mounted thereon, a readily detachable unitV for adjusting the implementby force applied at the tractor, said unit comprising a first device mounted upon the tractor and composed of a cylinder and a piston slidable therein, a second device mounted upon the implement and composed of a cylinder and' a pistonslidable therein, a conduit oonnecting the devices, and fluid contained in the conduit andthe cylinders, means connecting thepiston of the second device and the implement, external mechanical means connected withthe piston of the first device for shifting the same and therewith the piston of the second device for adjusting. the implement, and means connecting the external mechanical means and the tractor power plant and comprising means for holding the piston of the first device in any one of a plurality pf positions betweenthe ends of the cylinder of the first device for holding the piston of the second in any one, of a plurality of positions between theends Vof the cylinder of the second device thereby to hold the implement in any one of a plurality of positions of adjustment.

7.'I,n; combination, a tractor having a power plant, van implement 'floatingly connected to the tractor, said implement having a functional implement part adjustably mounted thereon, a unit having one end mounted upon the tractor and the otherv end mountedl upon the implement for adjusting the implement by force applied at the tractor, said unit having conduit means extending from the tractor to the implement, affirst movable part'at the end of thev conduit means onthe tractor, a second movable part at the end of the conduit means' on the implement, and a fluid contained inlthe conduit means such as to cause movement of the first movable part to effect movement of the second movable part, means connecting the second movable part and the implement, external shiftable mechanical means on the tractor for moving the first part and there- With'thes'econd movable part for adjustment of the implement, and a fluid-power device connected with the tractor power plant for shifting the external mechanical means. '8.' In combination, a 'tractor having a power plant, an implement floatingly oonnect'ed'to'the tractor,' said implement having a functional, implement part adjustably mounted'fthereon, a unit ha'ving one endmounted upon thefltractor 'and the other end mounted' upon the* implement for adjusting the implement by for-ce'applied at the tractor, said unit havinglconduit'means extendin'g'from the tractork to'the' implement and a fiuid contain'ed in the conduitimeans'such as 'to cause a force 'applied to the end of the unit on the tractor to be transmitted by the fluid to the'end of the 'unit on the implement, means connecting the end of the unit'on the implement to the implement, external mechanical means on the tractorlfor applying force to the end of the unit on the tractorand therewith force to the end of the unit on the implement for adjusting the implement, and a fluid-power 'device connected'with the tractor power plant for actuating the external mechanical'means. 4 i

9. In combination,A a tractor having a power plant, an implement floatingly connected to the tractor, said implement having a functional implement part adjustably mounted thereon, a unit for adjusting the implement by force applied at the tractor, said unit comprising a first device mounted upon the tractor andV composed of a cylinder and a piston slidable therein, a second device mounted upon the implement and composed of a cylinder and a piston slidable therein, a conduit connecting the devices, and fluid contained in the conduit and the vcylinders, means oonnecting the piston of the second device and the implement, external mechanical means connected With the piston of the first device' for shifting the same and therewith the'piston of the second device for adjusting the implement, and a fluid-power device connected With the tractor power plant for shifting the external mechanical means. I

10. The combination specified in' claim 9, and further including resilient means for 'urging the piston of the second device in one direction inl its cylinder.

11. In combination, a tractor having'a power plant, an Ladjustable implement connected to the tractor, a readily detachable unit for adjusting the implement .by force applied at the tractor, said unit comprising a first device mounted upon the tractor and composed of a cylinder and a piston slidable therein, a second device mounted upon the implement and composed of a cylinder and a piston slidable therein, a first conduit connecting'the cylinder at one side of the piston 'of the first device and the cylinder at one side of the piston of the second device, a second conduit connecting the cylinder at the other side of the piston of the first device and the cylinder at the other side of the piston of the second device, and fluid contained in the conduit and the cylinders, means connecting the piston of the second device and the implement, and external mechanical means connected With the piston of the first de- Vice for shifting the same and therewith the piston of the second device for adjusting the implement, and a fluid-power device connected with the tractor power plant for actuating the external mechanical means to shift the piston connected therewith.

12. In combination, a tractor having a power plant, a ground supported implement having an adjustable working part thereon fioatingly connected to the tractor,-a unit having one end mounted upon the ltractor and the other end mounted upon the implement for adjusting the implement .by force applied at the tractor, said unit having conduit means extending from the tractor to the implement and a force-transmitting means contained 'in .the conduit means such as to cause a. force applied at the end of the unit on the tractor to be transmitted to the end of the unit on the implement, means connecting the end of the unit on the implement to the implement, external mechanical means on the tractor for applying force to the end of the unit on the tractor and therewith force to the end of the unit on the implement for adjusting the implement, and a fluid-power device connected With the tractor power plant for actuating the external mechanical means to apply force to the unit.

13. In combination With a tractor having a pair of independently operable power-actuated members thereon and manual control means for independently adjusting said members to a plurality of positions and to lock said members in any one of the selected positions, an implement connected to the tractor, mechanical lifting linkage mechanism connecting said implement, to one of said poWer-alctuated members, said implement having an adjustable implement part thereon, and a hydraulic unit including a first cylinder element and a piston element therein, one of said elements being secured to the implement part to be adjusted, a second cylinder element and a pisto-n element therein, one' of said elements being connected to the tractor and the other to one of the poWer-actuated members thereon, and a fiexible fluid conduit connecting said cylinders.

14. In combination With a tractor having an i operator's station and a poWer-actuated member thereon and manually operable control means adjacent the o-perator's station for shifting said member to any one of a plurality of selected positions, an implement connected to the tractor having a portion adjustable relative to the tractor, a unitary self-contained hydraulic unit including a first cylinder element and a piston element, one

of said elements being mounted on the tractor operable control means for shifting said member to any one of a plurality of positions and locking the tmember in the selected position, a ground- Working implement connected to the tractor having gauge means adjustable relative to the implement for regulating the depth of penetration of the implement, a unitary self-contained hydraulic unit includinga first cylinder element and a piston element, one of said elements being mounted on the tractor and the other element being secured to the poWer-actuated member, said hydraulic unit also including a second cylinder and a second piston mounted therein, one of said elements being connected to the gauge means and the other element being connected to the implement, and a fiexible conduit connecting said cylinders.

16. In combination with a tractor having a poWer-actuated lifting and adjusting member thereon and manually operable means to control the position of said member and to lock it in any one of a plurality of adjusted positions, a ground supported implement floatingly connected to the tractor, said implement having an adjustable implement part and a movable member operative to adjust said implement part and a unitary selfcontained hydraulic unit including a cylinder element and a piston element, one of said elements being secured to the tractor and the other element being secured to the poWer-actuated member, said hydraulic unit including a second cylinder element and a, second piston element mounted therein, one of said elements being secured to the implement and the other to the implement-adjusting member, and a flexible fluid conduit member connecting said cylinders Where- -by adjustment of the implement part from the tractor is accurate and remains in adjusted position for any position of the implement with respect to the tractor. i

17. In combination With a tractor having a power-actuated motor thereon and manually operable means to control the position of said mem- |ber and to lock it in any one of a plurality of adjusted positions, an implement connected to the tractor and having a movable implement part, a movable member to adjust said implement part, and a unitary self-contained hydraulic unit including a cylinder element and a piston element therein, one of said elements being secured to the tractor and the other element being secured to the power-actuated member thereon, said hydraulic unit including a second cylinder element and a second piston element mounted therein, one of said elements being secured to the implement and the other to the implement-adjusting member, said cylinders and pistons being constructed for fluid pressure at either side of the piston, and a pair of flexible fluid conduits connecting said cylinders on opposite sides of the pistons.

18. In a tractor-implement combination, a tractor having a, power-lift mechanism thereon including a selectively movable member, an implement frame pivotally connected to the tractor and having a plow connected thereto, gauge means pivotally connected to said frame, and a hydraulic power-lift device including a first cylinder element and a piston element, one of said elements being connected to the gauge means and the other to the frame, a second cylinder element and a second piston element, one of said elements being connected to the tractor and the other to one of the movable members, and a fiexible conduit connecting said cylinders and adapted to .tr'fnshiityffluid *pressure/from: one "to the 19,.In 'a tractor-implement combination, a tractor havingV two independentlyoperable powerlift mechanisms thereomea'chmechanism including; a-selectively movable member-,an implement frarnjpivotany connected tojtnejtractor and having'aV plow,connectedtheretdgauge means privotlally connected to saidframel, aihydraulic powerlift deviceincludingafirst'cylinder element and aj pistonjelement, one of said elements being connectedV 'to the gauge means and the other to the frame; arsecond cylinder-'element andV a second piston elementl oneV of said elements being connected to the tractor and'the other to one of the movablemembers, and a-flexible conduit connecting said cylinders and adapted to-transmit fluid pressure 'from one to the other, and asecond power-lift device connected to the other'selectively movable member and'to the implement frameffor lifting the same. v

2,0. tractor-implement combination v includingI atractor having a pair of independently-operablef selectively movable power-lift members thereon, an implement 'frame pivotally connected toV thefl tractor, said frame having a tool connected thereto, lifting means for the frame including linkage connected directly to one of 'said power-'lift members,v said linkage including a lostmotion "com'iectionito permit-fioating movement of'the frame relative to the-tractor during operation, glauge means carried by said frame and adjustable vertically to gauge position of the tool relative to the ground'linkage carried 4by'th'e frame for 'adjusting said gaugemeans, and a hydraulic mechanism including a cylinder and piston connected between the tool and to the gauge means linkage, a cylinder and a piston connected betweena point on the' tractorv and one of the lifting members, and fiexible fluid conduit means connectingr the. two cylinders for transmitting pressure therebetween.

21.: Af tractor-'implement combination including atractorhaving a1pair of independently operable;v movable power-lift members thereon, a v

plow pivotally connected to they tractor, lifting means for the plowincluding linkage connected directly-to one of'said :power-lift members, said linkageincluding Va lost-motion connection to permitziloating movement of the plow relative to the tractor during operation, a gauge wheel carried by said plow and adjustable vertically to gauge the. Operating depth of the plow,.linkage carried by the plow for adjusting said gauge wheel, and a hydraulic mechanism including a cylinder and piston device mounted on the plow and connected to the gauge-wheel linkage, a cylinder'and a piston device mounted on the tractor and4 connected 'to one of the lifting members, and flexible fiuid conduit means connecting the two cylinders for transmitting pressure therebetween.

22. In combination, a tractor having an operat'or*s"station thereon, an implement lifting and adjusting member on the tractor, means operated by 'the power plant of the tractor for selectively moving said member,. ycontrol means for said means located adjacent the operator's station, said means being operable to select any position ofnsaid'power actuating membena mobile ground supported implement fioatingly connected to said tractor to be drawn thereby, said implement including an adjustable functional implement part, means on said implement for regulating the operating position of 'said implement part, an ad'- justing element on said 'implement connected to 1-6 said last named means,-hydraulica1ly operated adjustingI means mount'edon the implement and connected to said adjusting'relementI and hy"- draulic'f means for supplying regulating and ad'- justing power'from the tractorto theimplement, said hydraulic meansbeing readily removable from the tractor whereby the implement may' be detached from the 'tractor with 'the hydraulic controls, said means including a cylinder and a piston mounted on the tractor with the cylinder connected to thetractor and the piston connected to the power actuated member thereon and afluld conduit connecting said cylinder with the hydraulic unit von the implement for transniitting fluid power thereto through theh flexible conduit whereby accurate, adjustmentv of the implement part Vmay be obtained and maintained during travel'of the tractor and during movementv of the implement in any direction relative to the tractor.- i

2,3. In combination, a tractor having an opera tor'sstationlthereon, an implementfllifting and adjusting member on the tractor, means operated by the power plant of the, tractor'for selectively moving said member, control means V'for'safid means locatedadjacent the operator's station, said means being operable to selectL any position of said power actuatingfmemben'an implement connected to said tractor to be drawn thereby, said implement including an adjustable functional implement part, means on saidimplement for regulating the Operating position. of saidimplement part, anjadjusting element on said implement connected to said last named means, hydraulically operatedy adjusting meansmounted on the implement and connected .to said' adjusting element and hydraulic means for supplying regulating and adjusting power from the tractor to the implement, said hydraulic means 'being readily removable from the tractor whereby the implement may be detached from the Vtractor with the hydraulic controls, said means including a cylinder and a.piston mounted on the tractor with the cylinder connected to the tractor and the piston connected to the power actuated member thereon and a fluid conduit connecting said cylinder with the hydraulic unit on the implement for transmitting fluid power thereto through the flexible conduit whereby accurate adjustment of the implement part may be obtained and maintained during travel of the tractor.

24. In combination, aitractor having an operatoris station thereon, an implement lifting and adjusting member on the tractor, means operated by the power plant of the tractor for selectively moving said member, control means for said means located adjacent the operator's station, said means being selectable to determine any position of said power actuating member, a mobile ground supported implement fioatingly connected to said tractor to be drawn thereby, said implement including an adjustable functicnal implement part, means on said implement for regulat- .ing the Operating position of said implement part,

connected to the'tractor and the'piston connected to the Power actuatedr member thereon and a fluid conduit connecting said cylinder with the hydraulic unit on the' implement for transmitting fluid power thereto through the flexible conduit whereby accurate adjustment of the implement part may be obtained and maintained during travel of the tractor and during movement of the implement in' any direction relative to the tractor.

25. In combination, a tractor having an operator's station thereon, a hydraulically operated implement lifting and adjusting member on the tractor, hydraulically operated means for selectively moving said member, manual control means for actuating said hydraulic means located adjacent the operator's station, said means being selectable by the operator to determine any position of said power actuating member, a mobile ground supported implement floatingly connected to said tractor to be drawn thereby, said implement including an adjustable functional implement part, means on said implement for regulating the Operating position of said implement part, an adjusting element on said implement connected to said last named means, hydraulically operated adjusting means mounted on the implement and connected to said adjusting element and power transmitting means for supplying, regulating and adjusting power from the tractor to the implement without the continuity of fluid 1 lines from the tractor hydraulically operated means whereby the implement may be detached from the tractor with the hydraulic adjusting means without making or breaking liquid connections with the hydraulic means on the tractor,

said means including a cylinder and a piston mounted on the tractor with the cylinder connected to the tractor and the piston connected to the power actuated member thereon and a fiuid conduit connecting said cylinder with the hydraulic unit on the implement for transmitting fluid power thereto through the fiexible conduit whereby accurate adjustment of the implement part may be obtained and maintained during travel of the tractor and during movement of the implement in any direction relative to the tractor.

26. In combination with a tractor having an operator's station thereon, a power actuated member on the tractor, means operated from the power plant of the tractor Operating said member, means accessible to an operator on said station for controlling said Operating means and thereby controlling the position of said power actuated member, means for looking said power operated member in any one of a plurality of adjusted positions, an implement connected to the tractor for movement relative thereto in a plurality of directions, an implement part connected to said implement and movable relative thereto, a member on said implement and connected to said implement part movable to adjust said implement part to thereby control its working position, and a unitary self-contained hydraulic unit including a cylinder mounted on the tractor and a piston in the cylinder secured to the power actuated member, a cylinder secured to the implement having a piston therein secured to the implement adjusting member and flexible fluid conduit means connecting said cylinders, said association of parts providing means whereby an operator on the tractor may control the power lift member thereon during movement of the tractor and thereby through the provision of the self-contained hydraulic unit to selectively and accurately control the working position on 18 the implement part on an implement connected to the tractor during movement of the tractor and implement.

27. In combination with a tractor having an Operators station thereon, a power actuated member on the tractor, means operated from the power plant of the tractor Operating saidmember, means. accessible to an operator on said station for controlling said operating means and thereby controlling the position of said power actuated member, means for looking said power operated member in any one of a plurality of adjusted positions, an implement connected to the tractor for movement relative thereto in a plurality of directions, an implement part connected to said implement and movable relative thereto, a member on said implement and connected to said implement part movable. to adjust said implement part to thereby control its working position, anda unitary self-contained hydraulic unit including a cylinder mounted on the tractor and a two-way piston in the cylinder Secured to the powerv actuated member, a cylinder Secured to the implement having a two-way piston therein secured to the implement adjusting member and a pair of flexible fluidconduit means connecting said cylinders on opposite ends at different sides of the pistons, said association of parts providing means whereby an operator on the tractor may control the power lift member thereon during movement of the tractor and thereby through the provision of the self-contained hydraulic unit to selectively and accurately control the working position of the implement part on an implement connected to the tractor during movement of the tractor and implement.

28. In combination with a tractor having an operator's station thereon, a power actuated member on the tractor, means operated from the power plant of the tractor Operating said member, means accessible to an operator on said station for controlling said Operating means and thereby controlling the position of said power actuated member, means for looking said power operated member in any one of a plurality of adjusted positions, an implement fioatingly connected to the tractor for movement relative thereto in a plurality of directions, a functional implement part connected to said implement and movable relative thereto, a member on said implement and connected to said implement part movable to adjust said implement part to thereby control its working position, and a unitary selfcontained hydraulic unit including a cylinder mounted on the tractor and a piston in the cylinder Secured to the power actuated member, a cylinder secured to the implement having a piston therein secured to the implement adjusting member and flexible fluid conduit means connecting said cylinders, said association of parts providing means whereby an operator on the tractor may control the power lift member thereon during movement of the tractor and thereby through the provision of the self-contained hydraulic unit selectively and accurately to control the working position of the implement portion on the implement floatingly connected to the tractor during movement of the tractor and impiement and during movement of the implement relative to the tractor.

29.In combination with a tractor having an operator's station thereon, a power actuated member on the tractor, means operated from the power plant of the tractor Operating said member, means accessible to an operator on said station for controlling said operating means and thereby controlling the position of said power actuated member, means for locking said power operated member in any one of a plurality of adjusted positions, an implement fioatingly connected to the tractor for movement relative-thereto in a, plurality of directions, a functional implement part connected to said implement and movable relative thereto, a member on said implement and connected to said implement part movable to adjust said implement part to thereby control its working position, and a unitary self-contained hydraulic unit including a cylinder mounted on the tractor and a twoway piston in the cylinder secured to the power actuated member, a cylinder secured to the implement having a two-Way piston therei'n secured to the implement adjusting member and a pair of flexible fluid conduit means connecting said cylinders on opposite ends at different sides of the pistons therein, said association of parts providing means whereby an operator on the tractor may control the power lift member thereon during movement of the tractor and thereby through the provision of the self-contained hydraulic unit selectively and accurately control the working position of the implement part on the implement fioatingly connected to the tractor during movement of the tractor and implement and during movement of the implement relative to the tractor.

30. In combination with a tractor having an operator's station thereon, a power actuated member on the tractor, means for operating said member from the power plant of the tractor, means accessible to an operator on said station forcontrolling said Operating means and thereby controlling at will the position of said Operating; means including means for looking said power operated member in any one of a, plurality of positions, a flexible extensible power actuated device adapted to be utilized with one portion remotely positioned from the tractor, said device including at the remote portion, a cylinder member and a plunger member mounted for recipro-4 cation inthe cylinder member, said device further including an extensible power actuated structure mounted on the tractor, said structure including a second cylinder member and a second plunger member mounted for reciprocation in said cylinder member, one of said second members being mounted on thetractor and the other of said second members being connected to the power-actuated member on'the tractor, and a fiexible conduit connecting the cylinder member on the tractor-mounted structure with the cylinder member on the extensible device, said conduit providing means for confining a pressure transmitting medium for transmitting power from the plunger member of the tractor-mounted structure to the plunger member of the extensible device, whereby an operator on the tractor may from a remote point toy means of the controlling means adjacent the operator's station accurately adjust the extensible device.

31. In combination with a tractor having an operatoris station thereon, a power actuated member on the tractor, means for Operating said member from the power plant of the tractor, means accessible to an operator on said station for controlling said Operating means and thereby controlling at will the position of said Operating means including means for looking said power oprated member in any one of a plurality of 20 positions, a fiexible extensible power actuatedl device adapted to be utilized with one portion. remotely positioned from the tractor, said device: including at the remote portion, a cylinder mem-| -ber and a plunger member mounted for recipro-- cation in the cylinder member, said device fur-- ther including an extensible power actuated'. vstructure mounted on the tractor, said structureincluding a second cylinder member and a second plunger member mounted for reciprocation in said cylinder member, one of said second members being mounted on the tractor and the other of saidrsecond members being connected to the power-actuated member on the tractor, and a flexible conduit connecting the -cylinder member on the tractor-mounted structure with the cylin- -der member on the extensible device, said conduit providing means for confining a pressure transmitting medium for transmitting power from the I plunger member of the tractor-mounted structure to the plunger member of the extensible device, whereby an operator on the tractor may from a. remote point by means of the controlling meansy adjacent the operator's station accurately adjust; the extensible device, one of the members of the: tractor-mounted structure being pivotally con-- nected to the power actuated member on the: tractor and the other member thereof being piv-- otally connected to the tractor whereby by dis-I connecting said pivotal connections the poweractuated device, the iiexible conduit and the tractor-mounted structure may be removed as a unit.

32. In combination with a tractor having an Operators station thereon, a power actuated :member on the tractor, means for Operating said member from the power plant of the tractor, means accessible to an operator on said station for controlling said Operating means and thereby controlling at will the position of said Operating means including means for locking said power operated member in any one of a plurality of positions, a flexible extensilble power actuated device adapted to be utilized with one portion remotely positioned from the tractor, said device including at the remote portion, a cylinder member and a plunger member mounted for reciprocation in the cylinder member, said device further including an extensible power actuated structure mounted on the tractor, said structure including a second cylinder member and a second plunger member mounted for reciprocation in said cylinder member, one of said second members being mounted on the tractor and the other of said second members being connected to the power-actuated member on the tractor, and a flexib-le fluid conduit communicating with the cylinder member on the tractor-mounted structure With the cylinder member on the extensible device, said conduit providing means for confining fluid under pressure for transmitting power from the plunger member of the tractor-mounted structure to the plunger member of the extensible device, whereby an operator on the tractor may from a remote point by means of the controlling means adjacent the operator's station accurately adjust the extensible device.

33. In combination with a tractor having an operator's station thereon, a power actuated member on the tractor, means operated from the power plant of the tractor for Operating said member, means' accessible to an operator on said station for controlling said Operating means and thereby controlling the position of said power actuated member, means for looking said power operated member against movement in either direction in. any one of a plurality of adjusted positions, an implement connected to the tractor for movement relative thereto in a plurality of directions, an implement part connected to said implement and movable relative thereto, a member on said implement and connected to said implement part movable to adjust said implement part to thereby control its working position, and a fiexible power transmitting unit comprising a structure including a cylindrical casing member and a power transmitting plunger member slidable with respect to said casing member, one of said members being connected to the tractor and the other member being connected to the power actuated member on the tractor, a second structure including a cylindrical casing member and a power transmitting plunger member slidable with respect to said casing member one of said members being connected to the implement part and the other being connected to the implement adjusting member, and power transmitting means including a flexib-le conduit connecting the casing member on the tractor mounted structure and the casing member on the implement mounted structure and means within and confined by said kr conduit for transmitting power from the plunger member of the structure on the tractor to the plunger member of the structure attached to the implement part, whereby an operator on the tractor may selectively and accurately control the working position of the implement part during travel of the tractor and during movement of the implement with respect to the tracto-r.

34. In combination with a tractor having an operatons station thereon, a power actuated member on the tractor, means operated from the power plant of the tractor for Operating said member, means accessible to an operator on said station for controlling said Operating means and thereby controlling the position of said power 22 actuated member, means for looking said power operated member against movement in either direction in any one of a plurality of adjusted positions, an implement connected to the tractor for movement relative thereto in a plurality of directions, an implement part connected to said implement and movable relative thereto, a member on said implement and connected to said implement part movable to adjust said implement part to thereby control its working position, and a fiexible power transmitting unit -comprising a structure including a cylindrical casing member and a power transmitting plunger member slidable with respect to said casing member, one of said members being pivotally connected to the tractor and the other member being pivotally connected to the power actuated member on the tractor, a second structure including a cylindrical casing member and a power transmitting plunger member slidable with respect to said casing member, one of said members being pivotally connected to the implement and the other being pivotally connected to the implement adjusting member, and power transmitting means including a flexible conduit connecting the casing member on the tractor-mounted structure and the casing member on the implement-mounted structure and means within and confined by said conduit for transmitting power from the plunger member of the structure on the tractor to the plunger member of the structure attached to the implement part, whereby an operator on the tractor may selectively and accurately control the Working position of the implement part during travel of the tractor and during movement of the implement with respect to the tractor, said pivotal connections being detachable for removal of the transmitting unit.

RUSSEL D. ACTON. 

